Exemple #1
0
RS232_LIB unsigned int
rs232_write_timeout(struct rs232_port_t *p, unsigned char *buf,
			unsigned int buf_len, unsigned int *write_len,
			unsigned int timeout)
{
	unsigned int w = 0;
	struct rs232_windows_t *wx = p->pt;
	unsigned int wt = wx->w_timeout;

	DBG("p=%p p->pt=%p buf_len:%d\n", (void *)p, p->pt, buf_len);

	if (!rs232_port_open(p))
		return RS232_ERR_PORT_CLOSED;

	if (port_timeout(p, wx->r_timeout, timeout))
		return RS232_ERR_UNKNOWN;

	if (!WriteFile(wx->fd, buf, buf_len, &w, NULL)) {
		*write_len = 0;
		DBG("WriteFile() %s\n", last_error());
		return RS232_ERR_WRITE;
	}

	if (port_timeout(p, wx->r_timeout, wt))
		return RS232_ERR_UNKNOWN;

	*write_len = w;
	DBG("write_len=%d hex='%s' ascii='%s'\n", w, rs232_hex_dump(buf, w),
	    rs232_ascii_dump(buf, w));

	return RS232_ERR_NOERROR;
}
Exemple #2
0
RS232_LIB unsigned int
rs232_read_timeout(struct rs232_port_t *p, unsigned char *buf,
		   unsigned int buf_len, unsigned int *read_len,
		   unsigned int timeout)
{
	unsigned int r = 0;
	struct rs232_windows_t *wx = p->pt;
	unsigned int rt = wx->r_timeout;

	DBG("p=%p p->pt=%p buf_len: %d timeout: %d\n", (void *)p, p->pt, buf_len, timeout);

	if (!rs232_port_open(p))
		return RS232_ERR_PORT_CLOSED;

	*read_len = 0;

	if (port_timeout(p, timeout, wx->w_timeout))
		return RS232_ERR_UNKNOWN;

	if (!ReadFile(wx->fd, buf, buf_len, &r, NULL)) {
		*read_len = 0;
		DBG("ReadFile() %s\n", last_error());
		return RS232_ERR_READ;
	}

	if (port_timeout(p, rt, wx->w_timeout))
		return RS232_ERR_UNKNOWN;

	*read_len = r;
	DBG("read_len=%d hex='%s' ascii='%s'\n", r, rs232_hex_dump(buf, r),
	    rs232_ascii_dump(buf, r));

	return RS232_ERR_NOERROR;
}
Exemple #3
0
RS232_LIB unsigned int
rs232_read_timeout(struct rs232_port_t *p, unsigned char *buf,
		   unsigned int buf_len, unsigned int *read_len,
		   unsigned int timeout)
{
	unsigned int r = 0;
	struct rs232_windows_t *wx = p->pt;
	unsigned int rt = wx->r_timeout;

	DBG("p=%p p->pt=%p buf_len: %d timeout: %d\n", (void *)p, p->pt, buf_len, timeout);

	if (!rs232_port_open(p))
		return RS232_ERR_PORT_CLOSED;

	*read_len = 0;

	if (port_timeout(p, timeout, wx->w_timeout))
		return RS232_ERR_UNKNOWN;

	if (!ReadFile(wx->fd, buf, buf_len, &r, NULL)) {
		*read_len = 0;
		DBG("ReadFile() %s\n", last_error());
		return RS232_ERR_READ;
	}

	if (port_timeout(p, rt, wx->w_timeout))
		return RS232_ERR_UNKNOWN;

	*read_len = r;
	DBG("read_len=%d hex='%s' ascii='%s'\n", r, rs232_hex_dump(buf, r),
	    rs232_ascii_dump(buf, r));

	/* TODO - This is lame, since we rely on the fact, that if we read 0 bytes,
	 * that the read probably timeouted. So we should rather measure the reading
	 * interval or rework it using overlapped I/O */
	return *read_len == 0 ? RS232_ERR_TIMEOUT : RS232_ERR_NOERROR;
}